KCET2015ChemistryHydrogen
Water softening by Clark's process uses
Options
- A( CaHCO ₃ )
- B( NaHCO ₃ )
- C( Na ₂ CO ₃ )
- D( Ca ( OH )₂ )
Correct answer
D. ( Ca ( OH )₂ )
Step-by-step solution
Clark's process is a commercial method of water softening. A calculated amount of quick lime is added to hard water, bicarbonates are converted into insoluble calcium and magnesium carbonates which are filtered off. CaO + H ₂ O Ca ( OH )₂ Ca ( H CO ₃ )₂+ Ca ( OH )₂ 2 CaCO ₃ +2 H ₂ O Mg ( HCO ₃ )₂+ Mg ( OH )₂ 2 MgCO ₃ +2 H ₂ O